A dual pressure travel switch

Abstract

A double pressure travel switch, characterized in that it comprises two pressure switch units and an inverted T-shaped insulating seat, grooves are arranged on the platforms on both sides of the inverted T-shaped insulating seat, the two pressure switch units are arranged side by side on the platforms on both sides of the insulating wall in the middle of the inverted T-shaped insulating seat, the spring pieces are arranged below the platforms, and the contact switch part and the mounting piece part with the adjustment device are located above the platforms, wherein the contact switch part is arranged in the groove, and the spring pieces of the two pressure switch units respectively drive the contact spring pieces of their respective contact switch parts through the insulating columns on the two platforms. Compared with the prior art, the present invention has the advantages of accurate control accuracy, no mutual influence between the two pressure switch units, and prevention of water dripping pollution.

Description

Technical field:

[0002] The invention relates to a pressure control switch. Background technology:

[0004] As disclosed in Patent 201020678973.8, the existing pressure travel switch capable of high and low pressure control is a pressure switch unit that shares a spring sheet. The spring sheet is driven to move by the expansion of a trigger rod under pressure against the bottom of the pressure cooker, thereby simultaneously driving the contact points of the two pressure switch units to move. By adjusting the adjustment devices of the two pressure switch units, the amplitude of the different spring sheet movements that cause the pressure switch units to respond is adjusted, thereby achieving the purpose of high and low pressure control. This dual pressure travel switch has the following disadvantages:

[0005] 1. Since the trigger rod is located in the middle of the two pressure switch units, it is affected by the different forces when the contacts of the two pressure switch units respond, resulting in differences in the moving distances of the springs on both sides of the trigger rod, which in turn leads to inaccurate control accuracy.

[0006] 2. The two pressure switch units arranged side by side are very close to each other, so the electric sparks generated by the opening and closing of the contacts are likely to affect each other.

[0007] 3. Both pressure switch units are exposed to the outside without any shielding. When water (such as condensed water) drips, it is easy to stick to the contacts and cause switch failure. Summary of the invention:

[0009] The invention aims to provide a dual-pressure travel switch with accurate control accuracy, two pressure switch units that will not affect each other, and which can prevent water dripping pollution.

[0010] The present invention is implemented as follows: it includes two pressure switch units and an inverted T-shaped insulating seat, grooves are arranged on the platforms on both sides of the inverted T-shaped insulating seat, the two pressure switch units are arranged side by side on the platforms on both sides of the insulating wall in the middle of the inverted T-shaped insulating seat, the spring pieces with a trigger rod constituting the pressure switch unit are arranged below the platform, the contact switch part and the mounting piece part with an adjustment device constituting the pressure switch unit are located above the platform, wherein the contact switch part is arranged in the groove, the spring piece, the contact switch part and the mounting piece part are fixed on one side of the platform through a tubular connecting bracket with an insulating gasket that is penetrated through the platform, and the other sides of the two platforms are movably penetrated with insulating columns, and the spring pieces of the two pressure switch units respectively drive the contact spring pieces of their respective contact switch parts through the insulating columns on the two platforms.

[0011] The technology of the present invention avoids the disadvantage of the prior art of sharing a spring piece because the two pressure switch units work independently. An inverted T-shaped insulating seat is adopted, and the two pressure switch units are separated by an insulating wall in the middle. In this way, the electric sparks generated by the opening and closing of the contacts will not affect each other. The contact switch part is hidden in the groove, and when in use, the groove is downward. In this way, even if water drips, it is not easy to enter the groove and contaminate the contact switch part, thereby ensuring the normal operation of the contact switch part.

[0012] Compared with the prior art, the present invention has the advantages of accurate control precision, no mutual influence between the two pressure switch units, and prevention of dripping water pollution. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 Figure 1 Right view of . Specific implementation method:

[0017] The present invention is now described in further detail with reference to the accompanying drawings and embodiments:

[0018] Example 1: Figure 1 , 2 As shown, it includes two pressure switch units a and an inverted T-shaped insulating seat b. The platforms 1 on both sides of the inverted T-shaped insulating seat b are provided with grooves 2. The two pressure switch units a are arranged side by side on the platforms 1 on both sides of the insulating wall 12 in the middle of the inverted T-shaped insulating seat b. The spring piece 4 with a trigger rod 3 constituting the pressure switch unit a is arranged below the platform 1. The contact switch part 6 with two wiring ears 5 and the mounting piece part 8 (also called a pressure plate) with an adjusting device 7 constituting the pressure switch unit a are located above the platform 1. The contact switch part 6 is arranged in the groove 2. The spring piece 4, the contact switch part 6, and the mounting piece part 8 are fixed on one side of the platform 1 through a tubular connecting bracket 10 with an insulating gasket 9 that is penetrated on the platform 1. The other sides of the two platforms 1 are movably penetrated with insulating columns 11. The spring pieces 4 of the two pressure switch units a drive the contact spring pieces 6a of their respective contact switch parts 6 through the insulating columns 11 on the two platforms 1.

Claims

1. A dual pressure travel switch, characterized in that The utility model comprises two pressure switch units and an inverted T-shaped insulating seat. Grooves are arranged on the platforms on both sides of the inverted T-shaped insulating seat. The two pressure switch units are arranged side by side on the platforms on both sides of the insulating wall in the middle of the inverted T-shaped insulating seat. The spring piece with a trigger rod constituting the pressure switch unit is arranged below the platform. The contact switch part and the mounting plate part with an adjusting device constituting the pressure switch unit are located above the platform. The contact switch part is arranged in the groove. The spring piece, the contact switch part and the mounting plate part are connected to the platform through a tubular connection bracket with an insulating gasket. It is fixed on one side of the platform, and insulating columns are movably connected on the other sides of the two platforms. The springs of the two pressure switch units drive the contact springs of their respective contact switch parts through the insulating columns on the two platforms respectively. An inverted T-shaped insulating seat is adopted, and the two pressure switch units are separated by the insulating wall in the middle. In this way, the electric sparks generated by the opening and closing of the contacts will not affect each other. The contact switch part is hidden in the groove, and when in use, the groove is downward, so that even if water drips, it is not easy to enter the groove to contaminate the contact switch part, thereby ensuring the normal operation of the contact switch part.

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